Question

有没有办法在整个iOS应用程序中将UIButtons中的特定音频文件设置为点按声音而无需在个别视图中编写代码？

Answer 1

您不希望在子类中添加任何代码。因此您可以将UIApplication子类化为：

@interface PlaySound : UIApplication

@end

@implementation PlaySound
- (BOOL)sendAction:(SEL)action to:(id)target from:(id)sender forEvent:(UIEvent *)event{

    if ([sender isKindOfClass:[UIButton class]]) {
        //here, play sound
    }
    return [super sendAction:action to:target from:sender forEvent:event];
}
@end

并在main.m注册您自己的应用程序，如：

    int main(int argc, char *argv[])
{
    @autoreleasepool {
        NSString *appClass = @"PlaySound";
        int retVal = UIApplicationMain(argc, argv, appClass, NSStringFromClass([AppDelegate class]));
        return retVal;
    }
}

然后，当人们触摸按钮控件时，您的自定义应用程序将收到此消息并播放声音。您不必在任何单独的视图中编写任何代码。

Answer 2

您可以通过在 AppDelegate 文件

中编写一次代码来实现此目的

在 AppDelegate.m 中编写一个类方法，如下面给出的

+(void)playAlarmSound
{
     NSString *sound_file;

    if ((sound_file = [[NSBundle mainBundle] pathForResource:@"Output" ofType:@"aif"])){

    NSURL *url = [[NSURL alloc] initFileURLWithPath:sound_file];
    if (audioPlayer)
    {
        [audioPlayer release];
        audioPlayer= nil;
    }
    AVAudioPlayer *audioPlayer = [[[AVAudioPlayer alloc] initWithContentsOfURL:url error:NULL]autorelease];
    audioPlayer.delegate = self;
    [url release];
    audioPlayer.numberOfLoops=0;
    [audioPlayer prepareToPlay];
    [audioPlayer play];

   }
  }

在 AppDelegate.h

中

+(void)playAlarmSound;

现在，在您要调用上述方法的班级中，请写下以下行

[AppDelegate playAlarmSound];

注意： - 导入AVFoundation框架

Answer 3

我会说，创建一个'Observer'类，播放所有按钮连接的声音。检查this示例。

Answer 4

创建一个类别是要走的路。由tiguero

回答

·H：

#import <UIKit/UIKit.h>

@class SCLSoundEffect;

typedef enum {
  SCLCLICKSOUND = 0,
  SCLOTHERSOUND,  
} 

SCLSoundCategory;


@interface UIButton (soundEffect)

@property (nonatomic, strong) SCLSoundEffect *buttonSoundEffect;


+ (id) buttonWithType:(UIButtonType)buttonType andSound: (SCLSoundCategory)soundCategory;
- (void) playSound;

@end

的.m：

#import "UIButton+soundEffect.h"
#import <objc/runtime.h>
#import "SCLSoundEffect.h"

static char const * const kButtonSoundEffectKey = "buttonSoundEffect";

@implementation UIButton (soundEffect)

@dynamic buttonSoundEffect;


+ (id) buttonWithType:(UIButtonType)buttonType andSound:(SCLSoundCategory) soundCategory;
{
    UIButton *newButton = [UIButton buttonWithType:buttonType];

    NSString *stringToUse = nil;

    switch (soundCategory) {
        case SCLCLICKSOUND:
            stringToUse = @"button_sound.wav";
            break;
        case SCLOTHERSOUND:
            assert(0); // To be defined

        default:
            break;
    }

    [newButton setButtonSoundEffect: [[SCLSoundEffect alloc] initWithSoundNamed:stringToUse]];
    [newButton addTarget:newButton action:@selector(playSound) forControlEvents:UIControlEventTouchDown];

    return newButton;
}


- (void) playSound
{
    [self.buttonSoundEffect play];
}


- (SCLSoundEffect *)buttonSoundEffect {
    return objc_getAssociatedObject(self, kButtonSoundEffectKey);
}

- (void)setButtonSoundEffect:(SCLSoundEffect *)buttonSoundEffect{
    objc_setAssociatedObject(self, kButtonSoundEffectKey, buttonSoundEffect, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void) dealloc
{
    [self setButtonSoundEffect:nil];
}
Now each time I create a button that play some sound I just need to use the following method:

UIButton *mySoundButton = [UIButton buttonWithType:UIButtonTypeCustom andSound:SCLCLICKSOUND];

如何在整个应用程序中设置UIButton敲击声？

4 个答案: